48 | P a g e S V C 8 2 0 ( P ) P o c k e t M a n u a l
48
Explanation: Indoor units ONLY. Flame rod is
detecting poor combustion. This is commonly caused
by inadequate GAS SUPPLY and/or VENTING.
Diagnostic Checks:
GAS SUPPLY & VENTING (refer to pages 8-11)
Flame rod FL-2
(See maintenance mode instructions on page 21)
Turn Power OFF.
Remove and reinsert connector Tand
Terminals on flame rods.
Turn Power ON.
While viewing through sight glass, operate unit to determine
IF flame is touching the flame rod(s).
Indoor models – 2 flame rods
(Connectors M& T).
Access maintenance mode
to check flame rod status &
continue to diagnostic chart
on next page.
YES
Remove any foreign debris.
IF foreign debris is not
present: CHECK GAS
SUPPLY & VENTING.
NO
HINT: Make sure DIP2 (altitude setting) is properly
set – see Page 25
(If unit shuts down 5 times within a 4 hour period
due to 13 – Error Code, the unit must be
reset by performing reset procedure
on page 26).
Connector Location
On Page 14
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